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3644 Kojitaku (1931 TW)
Classification: Main-belt Asteroid          SPK-ID: 2003644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09426410289431998 3.1183e-08  
a 2.248017124005977 7.238e-09 au
q 2.036109806520485 6.9252e-08 au
i 3.533849908835839 4.7369e-06 deg
node 355.279511078969 5.4585e-05 deg
peri 82.17076750107309 6.0534e-05 deg
M 291.0494844938151 2.5347e-05 deg
tp 2458836.294063193045
(2019-Dec-18.79406319)
8.6745e-05 TDB
period 1231.112807878602
3.37
5.9458e-06
1.628e-08
d
yr
n .2924183695402664 1.4123e-09 deg/d
Q 2.45992444149147 7.9203e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2042  
   data-arc span      32168 days (88.07 yr)  
   first obs. used      1931-10-05  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46037  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:28:17  

Additional Information
 Earth MOID = 1.0548 au 
 Jupiter MOID = 2.716 au 
 T_jup = 3.621 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO416749  
diameter diameter 5.764 km 0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.371   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3644 Kojitaku (1931 TW)          Discovered 1931-Oct-05 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 TW = 1973 AZ3 = 1977 FJ3 = 1978 PR2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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